I literally used this once to remove the polymer handguard from a 15-22 I had bought. I then installed a standard AR nut and free floated handguards. This Brownells Barrel Nut wrench did a great job and has just sat in its box ever since. It's like new.

Magpul makes some great stocks for AR rifles - especially the collapsible stocks with friction locks. The ACS, ACS-L, CTR, and STR family of stocks all have a lever in the front that when pressed locks the buttstock firmly to the recoil tube....

Real Avid came out with this slick tool that allows you to depress a 1911-style pistol's bushing, rotate it and capture the spring assembly. I bought this for my 10mm pistol but wound up selling the pistol before I used this. Thus, it never got...